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LT1766EGN-5#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
LT1766/LT1766-5
1
1766fc
TYPICAL APPLICATION
DESCRIPTION
5.5V to 60V 1.5A, 200kHz
Step-Down Switching Regulator
5V Buck Converter
FEATURES
APPLICATIONS
n
Wide Input Range: 5.5V to 60V
n
1.5A Peak Switch Current
n
Constant 200kHz Switching Frequency
n
Saturating Switch Design: 0.2Ω
n
Peak Switch Current Rating Maintained Over
Full Duty Cycle Range
n
Low Effective Supply Current: 2.5mA
n
Low Shutdown Current: 25μA
n
1.2V Feedback Reference Voltage (LT1766)
n
5V Fixed Output (LT1766-5)
n
Easily Synchronizable
n
Cycle-by-Cycle Current Limiting
n
Small 16-Pin SSOP and Thermally Enhanced
TSSOP Packages
The LT
®
1766/LT1766-5 are 200kHz monolithic buck switch-
ing regulators that accept input voltages up to 60V. A high
effi ciency 1.5A, 0.2Ω switch is included on the die along
with all the necessary oscillator, control and logic circuitry.
A current mode control architecture delivers fast transient
response and excellent loop stability.
Special design techniques and a new high voltage process
achieve high effi ciency over a wide input range. Effi ciency
is maintained over a wide output current range by using the
output to bias the circuitry and by utilizing a supply boost
capacitor to saturate the power switch. Patented circuitry
maintains peak switch current over the full duty cycle range.
A shutdown pin reduces supply current to 25μA and the
device can be externally synchronized from 228kHz to
700kHz with logic-level inputs.
The LT1766/LT1766-5 are available in a 16-pin fused-lead
SSOP package or a TSSOP package with exposed backside
for improved thermal performance.
n
High Voltage, Industrial and Automotive
n
Portable Computers
n
Battery-Powered Systems
n
Battery Chargers
n
Distributed Power Systems
Effi ciency vs Load Current
BOOST
V
IN
6
2
10
12
10MQ060N
15.4k
V
OUT
5V
1A
4
15
14
11
220pF
0.022μF
*
†
FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY
TDK C4532X7R2A225K
1, 8, 9, 16
LT1766
SHDN
SYNC
SW
BIAS
FB
V
C
GND
0.33μF
100μF 10V
SOLID
TANTALUM
47μH
1N4148W
4.99k
1766 TA01
2.2μF
†
100V
CERAMIC
V
IN
*
5.5V TO 60V
+
2.2k
ONOFF
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
1.00
1766 TA02
70
60
50
0.25
0.50
0.75
1.25
V
IN
= 12V
V
IN
= 42V
V
OUT
= 5V
L = 47μH
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents, including 6498466, 6531909.
LT1766/LT1766-5
2
1766fc
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage (V
IN
) .................................................. 60V
BOOST Pin Above SW .............................................. 35V
BOOST Pin Voltage ................................................. 68V
SYNC, SENSE Voltage (LT1766-5) ............................. 7V
SHDN Voltage ............................................................ 6V
BIAS Pin Voltage ..................................................... 30V
FB Pin Voltage/Current (LT1766) ................... 3.5V/2mA
Operating Junction Temperature Range
LT1766EFE/LT1766EFE-5/LT1766EGN/
LT1766EGN-5 (Note 8,10) ....................–40°C to 125°C
LT1766IFE/LT1766IFE-5/
LT1766IGN/LT1766IGN-5 (Note 8,10) ..–40°C to 125°C
LT1766HFE ..........................................–40°C to 140°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
GND
SW
NC
V
IN
NC
BOOST
NC
GND
GND
SHDN
SYNC
NC
FB/SENSE
V
C
BIAS
GND
17
GND
θ
JA
= 45°C, θ
JC
(PIN 17) = 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
GND
SW
NC
V
IN
NC
BOOST
NC
GND
GND
SHDN
SYNC
NC
FB/SENSE
V
C
BIAS
GND
θ
JA
= 85°C, θ
JC
(PIN 8) = 25°C/W
FOUR CORNER PINS SOLDERED TO GROUND PIN
PIN CONFIGURATION
LT1766/LT1766-5
3
1766fc
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T
J
= 25°C.
V
IN
= 15V, VC = 1.5V, SHDN = 1V, BOOST open circuit, SW open circuit, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Voltage (V
REF
) (LT1766) 5.5V ≤ V
IN
≤ 60V
V
OL
+ 0.2 ≤ V
C
≤ V
OH
– 0.2
l
1.204
1.195
1.219 1.234
1.243
V
V
SENSE Voltage (LT1766-5) 5.5V ≤ V
IN
≤ 60V
V
OL
+ 0.2V ≤ V
C
≤ V
OH
– 0.2V
l
4.94
4.90
5 5.06
5.10
V
V
SENSE Pin Resistance (LT1766-5) 9.5 13.8 19 kΩ
FB Input Bias Current (LT1766)
l
–0.5 –1.5 μA
Error Amp Voltage Gain (Notes 2, 9) 200 400 V/V
Error Amp g
m
dl (V
C
) = ±10μA (Note 9)
l
1500
1000
2000 3000
4200
μMho
μMho
V
C
to Switch g
m
1.7 A/V
EA Source Current FB = 1V or V
SENSE
= 4.1V
l
125 225 400 μA
EA Sink Current FB = 1.4V or V
SENSE
= 5.7V
l
100 225 450 μA
V
C
Switching Threshold Duty Cycle = 0 0.9 V
V
C
High Clamp SHDN = 1V 2.1 V
Switch Current Limit V
C
Open, Boost = V
IN
+ 5V, FB = 1V or V
SENSE
= 4.1V
l
1.5 2 3 A
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1766EFE#PBF LT1766EFE#TRPBF 1766EFE 16-Lead Plastic TSSOP 0°C to 125°C
LT1766IFE#PBF LT1766IFE#TRPBF 1766IFE 16-Lead Plastic TSSOP –40°C to 125°C
LT1766HFE#PBF LT1766HFE#TRPBF 1766HFE 16-Lead Plastic TSSOP –40°C to 140°C
LT1766EFE-5#PBF LT1766EFE-5#TRPBF 1766EFE-5 16-Lead Plastic TSSOP 0°C to 125°C
LT1766IFE-5#PBF LT1766IFE-5#TRPBF 1766IFE-5 16-Lead Plastic TSSOP –40°C to 125°C
LT1766EGN#PBF LT1766EGN#TRPBF 1766 16-Lead Plastic SSOP 0°C to 125°C
LT1766IGN#PBF LT1766IGN#TRPBF 1766I 16-Lead Plastic SSOP –40°C to 125°C
LT1766EGN-5#PBF LT1766EGN-5#TRPBF 17665 16-Lead Plastic SSOP 0°C to 125°C
LT1766IGN-5#PBF LT1766IGN-5#TRPBF 1766I5 16-Lead Plastic SSOP –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1766EFE LT1766EFE#TR 1766EFE 16-Lead Plastic TSSOP 0°C to 125°C
LT1766IFE LT1766IFE#TR 1766IFE 16-Lead Plastic TSSOP –40°C to 85°C
LT1766HFE LT1766HFE#TR 1766HFE 16-Lead Plastic TSSOP –40°C to 140°C
LT1766EFE-5 LT1766EFE-5#TR 1766EFE-5 16-Lead Plastic TSSOP 0°C to 125°C
LT1766IFE-5 LT1766IFE-5#TR 1766IFE-5 16-Lead Plastic TSSOP –40°C to 125°C
LT1766EGN LT1766EGN#TR 1766 16-Lead Plastic SSOP 0°C to 125°C
LT1766IGN LT1766IGN#TR 1766I 16-Lead Plastic SSOP –40°C to 125°C
LT1766EGN-5 LT1766EGN-5#TR 17665 16-Lead Plastic SSOP 0°C to 125°C
LT1766IGN-5 LT1766IGN-5#TR 1766I5 16-Lead Plastic SSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
(LT1766E/LT1766I Grade)
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LT1766EGN-5#PBF

Mfr. #:
Buy LT1766EGN-5#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 1.5A 200kHz High Voltage Step-down Regulator
Lifecycle:
New from this manufacturer.
Delivery:
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